diff --git a/setup.py b/setup.py
index a4dd80e66404e743cbb4ffacbea02946dc817275..cfbd8d935e581993e8f6a3bc06649ca979a2a35b 100644
--- a/setup.py
+++ b/setup.py
@@ -42,8 +42,8 @@ setup(name="loo.py",
           ],
 
       install_requires=[
-          "pyopencl>=2013.2",
-          "pymbolic>=2013.1",
+          "pyopencl>=2013.1",
+          "pymbolic>=2013.2",
           "cgen",
           "islpy>=2013.2"
           ],